The interface device for the roof fan should be located within ____ of the fan motor starter.

• A. 1 ft
• B. 2 ft
• C. 3 ft
• D. 6 ft

Answer: (C)

The reason this interface device should be placed within three feet of the fan motor starter is to allow quick, safe manual control from a reachable, visible position. Keeping the interface close to the starter minimizes the time and effort needed to shut the fan off in an emergency, helps ensure the control wiring is short and less exposed to heat or damage, and makes it easier for a technician to operate and observe both devices without reaching far. A distance that is too large would delay shutdown or control, while a distance that’s too tight can create clearance or maintenance issues; three feet offers a practical, safe compromise.